I'm using CRT Emudriver + groovymame 0.200. My arcade monitor is a big one, a Hantarex 28''. Everything is perfect except for some vertical games. To be concrete: Vertical games that uses resolution 288x244 (most of them are from NAMCO), 288x216 and 280x216

The problem in these games is that their screen is too large, so a part of the top and bottom is cut-off. Just check the screenshot I've attached of the game pac-man. It is missing the whole score panel at the top, and half of the lives panel at the bottom.I know I could solve this by using the "screen horiz stretch" slide in MAME but this leaves some image errors. Is there any other possible solution for this issue?

As far as I know, vertical size of the picture is not related with software and can't be adjusted via software settings. You have to adjust it via service menu or any related adjustment potentiometer on pcb.

I don't understand - galaga, xevious, pacman etc are all 288x224 mode games. I imagine that they would look weirdly stretched in 388x modes. Don't know the others offhand, but something strange must be going on with your setup. Do you have any 288x line modes installed? 288x240 should work well, no stretching required for those games I mentioned + probably all the others.

If it's a vertical monitor, and the top and bottom edges of the image are cut off (top and bottom being just that, as you're looking at the monitor) then you just use ArcadeOSD to shrink the modeline, and feed the timings back into mame.ini

Thank you!This is the kind of answer I was looking for. I needed to know if this was a normal "issue" in Groovymame or not. So I understand these are the only games whose vertical resolution doesn't fit into my horizontal monitor.I prefer not touching the pots everytime I run those games. So, in my case I contemplate two possible solutions:1) Doing nothing. I mean, I can live without knowing my score or number of lives. They don't look that bad on my monitor. 2) Creating an ini file per each game modifying their resolution to something similar that fits into my monitor.

Can't you just create a mode like 352x288 or 384x288 or 448x288, 512x288 for your Hantarex? Then you wouldn't have to squeeze your games into a smaller vertical resolution. The last two modes would allow for natural clean stretching, which looks better.

I prefer not touching the pots everytime I run those games. So, in my case I contemplate two possible solutions:1) Doing nothing. I mean, I can live without knowing my score or number of lives. They don't look that bad on my monitor. 2) Creating an ini file per each game modifying their resolution to something similar that fits into my monitor.

Unless you want to run all the vertical games in a non-optimal interlaced resolution like 640x480 (defeating the whole reason for running GroovyMAME + CRT Emudriver), there's no way to force them to fit with an ini file.

The problem isn't the resolution as much as the capabilities of the monitor. You can't force it to display more lines than you have it adjusted to show.

If you don't want to touch the pots then just load pacman, adjust the monitor so it just barely fits, and then you're done.

Horizontal games will be slightly letterboxed, but it's really not that noticeable.